Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, thi chieu
nhanh mang » nhanh lang, hanh mang, nhanh quang
nhung cong » dung cong, thong cong, hang cong
theo chu » cho chu, chao chu, theo yeu
tac toan » tap toan, hach toan, tich toan
tam toan » tap toan, tam than, pham toan
mang va » mang vua, hang va, bang va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo chieu) or (theo chu)) xanh - nhanh mang va nhung cong ((tac toan) OR (tam toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (theo chu)) xanh - nhanh mang va nhung cong ((tac toan) OR (tam toan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (theo chu)) xanh - nhanh mang va nhung cong ((tac toan) OR (tam toan)) cao".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (theo chu)) xanh - nhanh mang va nhung cong ((tac toan) OR (tam toan)) cao*.